The Ninja Mission is a 1984 Swedish action film directed by Mats Helge, starring the Polish actors Krzysztof Kolberger and Hanna Bieniuszewicz. All other roles are played by largely unknown Swedish and British actors. Plot summary. The story revolves around a Swedish scientist named Karl Markov working in the Soviet Union and his latest invention, an advanced nuclear fission control system which he wants to gift to the entire world. When the Russians intend to monopolize his invention, Markov decides to defect back to the West, but is held prisoner by the KGB.
https://en.wikipedia.org/wiki/The_Ninja_Mission